Marc Anthony's girlfriend has dismissed pregnancy rumours by posing with a cigarette.

There has been speculation that Shannon de Lima and Marc are expecting their first child together recently. The 24-year-old Venezuelan model had sparked rumours after posting messages on her Twitter account that seemingly hinted she was pregnant.

However, Shannon appeared eager to end the baby gossip as the pair attended a party for Marc's charity Maestro Cares.

At the bash in Shelborne South Beach, Miami, the beauty grabbed a cigarette and posed for photographers on the red carpet, reports New York Post.

Shannon had raised eyebrows earlier in the month after taking to her Twitter account.

"There once was a butterfly that was so in love she felt people in her stomach," de Lima tweeted. "Happy and in lovewith life!!! (sic)."

After baby rumours swirled, the model reportedly deleted the comment.

Marc went public with his romance with Shannon in January.

The 43-year-old salsa singer split from Jennifer Lopez in July last year after seven years of marriage. They have four year old twins together, Max and Emme.